굉장히 쉽게 처리하는 방법이다. I had the same issue, also with Scala IDE 4.0.0 . I followed mkurz instuctions and they worked like a charm. But instead of changing the .classpath file in the project folder manually I used Eclipse interface:In the top menu of the main window, click on Project and then on Properties.In the Properties window, click on Java Build Path option (options list is on the left)In the S..